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Dubail M, Heinrich S, Portier L, Bastian J, Giuliano L, Aggar L, Berthault N, Londoño-Vallejo JA, Vilalta M, Boivin G, Sharma RA, Dutreix M, Fouillade C. Lung Organotypic Slices Enable Rapid Quantification of Acute Radiotherapy Induced Toxicity. Cells 2023; 12:2435. [PMID: 37887279 PMCID: PMC10605600 DOI: 10.3390/cells12202435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Revised: 10/03/2023] [Accepted: 10/07/2023] [Indexed: 10/28/2023] Open
Abstract
To rapidly assess healthy tissue toxicities induced by new anti-cancer therapies (i.e., radiation alone or in combination with drugs), there is a critical need for relevant and easy-to-use models. Consistent with the ethical desire to reduce the use of animals in medical research, we propose to monitor lung toxicity using an ex vivo model. Briefly, freshly prepared organotypic lung slices from mice were irradiated, with or without being previously exposed to chemotherapy, and treatment toxicity was evaluated by analysis of cell division and viability of the slices. When exposed to different doses of radiation, this ex vivo model showed a dose-dependent decrease in cell division and viability. Interestingly, monitoring cell division was sensitive enough to detect a sparing effect induced by FLASH radiotherapy as well as the effect of combined treatment. Altogether, the organotypic lung slices can be used as a screening platform to rapidly determine in a quantitative manner the level of lung toxicity induced by different treatments alone or in combination with chemotherapy while drastically reducing the number of animals. Translated to human lung samples, this ex vivo assay could serve as an innovative method to investigate patients' sensitivity to radiation and drugs.
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Affiliation(s)
- Maxime Dubail
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Sophie Heinrich
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Lucie Portier
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Jessica Bastian
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Lucia Giuliano
- SBAI Department, Sapienza University of Rome, 00161 Rome, Italy
| | - Lilia Aggar
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Nathalie Berthault
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - José-Arturo Londoño-Vallejo
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Marta Vilalta
- Global Translational Science, Varian, a Siemens Healthineers Company, Palo Alto, CA 94304, USA
| | - Gael Boivin
- Global Translational Science, Varian, a Siemens Healthineers Company, Palo Alto, CA 94304, USA
| | - Ricky A. Sharma
- Global Translational Science, Varian, a Siemens Healthineers Company, Palo Alto, CA 94304, USA
- UCL Cancer Institute, University College London, London WC1E 6DD, UK
| | - Marie Dutreix
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
| | - Charles Fouillade
- Institut Curie, Inserm U1021-CNRS UMR 3347, Paris Saclay University, Centre Universitaire, 91405 Orsay Cedex, France
- Institut Curie, PSL Research University, 75006 Paris, France
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2
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Audi SH, Taheri P, Zhao M, Hu K, Jacobs ER, Clough AV. In vivo molecular imaging stratifies rats with different susceptibilities to hyperoxic acute lung injury. Am J Physiol Lung Cell Mol Physiol 2022; 323:L410-L422. [PMID: 35943727 PMCID: PMC9484995 DOI: 10.1152/ajplung.00126.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Revised: 06/26/2022] [Accepted: 08/05/2022] [Indexed: 11/22/2022] Open
Abstract
99mTc-hexamethylpropyleneamine oxime (HMPAO) and 99mTc-duramycin in vivo imaging detects pulmonary oxidative stress and cell death, respectively, in rats exposed to >95% O2 (hyperoxia) as a model of acute respiratory distress syndrome (ARDS). Preexposure to hyperoxia for 48 h followed by 24 h in room air (H-T) is protective against hyperoxia-induced lung injury. This study's objective was to determine the ability of 99mTc-HMPAO and 99mTc-duramycin to track this protection and to elucidate underlying mechanisms. Rats were exposed to normoxia, hyperoxia for 60 h, H-T, or H-T followed by 60 h of hyperoxia (H-T + 60). Imaging was performed 20 min after intravenous injection of either 99mTc-HMPAO or 99mTc-duramycin. 99mTc-HMPAO and 99mTc-duramycin lung uptake was 200% and 167% greater (P < 0.01) in hyperoxia compared with normoxia rats, respectively. On the other hand, uptake of 99mTc-HMPAO in H-T + 60 was 24% greater (P < 0.01) than in H-T rats, but 99mTc-duramycin uptake was not significantly different (P = 0.09). Lung wet-to-dry weight ratio, pleural effusion, endothelial filtration coefficient, and histological indices all showed evidence of protection and paralleled imaging results. Additional results indicate higher mitochondrial complex IV activity in H-T versus normoxia rats, suggesting that mitochondria of H-T lungs may be more tolerant of oxidative stress. A pattern of increasing lung uptake of 99mTc-HMPAO and 99mTc-duramycin correlates with advancing oxidative stress and cell death and worsening injury, whereas stable or decreasing 99mTc-HMPAO and stable 99mTc-duramycin reflects hyperoxia tolerance, suggesting the potential utility of molecular imaging for identifying at-risk hosts that are more or less susceptible to progressing to ARDS.
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Affiliation(s)
- Said H Audi
- Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
- Clement J. Zablocki Veterans Administration Medical Center, Milwaukee, Wisconsin
- Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Pardis Taheri
- Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
- Clement J. Zablocki Veterans Administration Medical Center, Milwaukee, Wisconsin
| | - Ming Zhao
- Department of Medicine, Northwestern University, Chicago, Illinois
| | - Kurt Hu
- Clement J. Zablocki Veterans Administration Medical Center, Milwaukee, Wisconsin
- Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Elizabeth R Jacobs
- Clement J. Zablocki Veterans Administration Medical Center, Milwaukee, Wisconsin
- Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anne V Clough
- Clement J. Zablocki Veterans Administration Medical Center, Milwaukee, Wisconsin
- Department of Mathematical and Statistical Sciences, Marquette University, Milwaukee, Wisconsin
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3
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Mu Q, Lv K, Yu J, Chu S, Zhang L, Kong L, Zhang L, Tian Y, Jia X, Liu B, Wei Y, Yang N. Hydrogen Repairs LPS-Induced Endothelial Progenitor Cells Injury via PI3K/AKT/eNOS Pathway. Front Pharmacol 2022; 13:894812. [PMID: 35645804 PMCID: PMC9133378 DOI: 10.3389/fphar.2022.894812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Accepted: 04/21/2022] [Indexed: 11/15/2022] Open
Abstract
Endotoxins and other harmful substances may cause an increase in permeability in endothelial cells (ECs) monolayers, as well as ECs shrinkage and death to induce lung damage. Lipopolysaccharide (LPS) can impair endothelial progenitor cells (EPCs) functions, including proliferation, migration, and tube formation. EPCs can migrate to the damaged area, differentiate into ECs, and participate in vascular repair, which improves pulmonary capillary endothelial dysfunction and maintains the integrity of the endothelial barrier. Hydrogen (H2) contributes to the repairment of lung injury and the damage of ECs. We therefore speculate that H2 protects the EPCs against LPS-induced damage, and it's mechanism will be explored. The bone marrow-derived EPCs from ICR Mice were treated with LPS to establish a damaged model. Then EPCs were incubated with H2, and treated with PI3K inhibitor LY294002 and endothelial nitric oxide synthase (eNOS) inhibitor L-NAME. MTT assay, transwell assay and tube formation assay were used to detect the proliferation, migration and angiogenesis of EPCs. The expression levels of target proteins were detected by Western blot. Results found that H2 repaired EPCs proliferation, migration and tube formation functions damaged by LPS. LY294002 and L-NAME significantly inhibited the repaired effect of H2 on LPS-induced dysfunctions of EPCs. H2 also restored levels of phosphor-AKT (p-AKT), eNOS and phosphor-eNOS (p-eNOS) suppressed by LPS. LY294002 significantly inhibited the increase of p-AKT and eNOS and p-eNOS expression exposed by H2. L-NAME significantly inhibited the increase of eNOS and p-eNOS expression induced by H2. H2 repairs the dysfunctions of EPCs induced by LPS, which is mediated by PI3K/AKT/eNOS signaling pathway.
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Affiliation(s)
- Qingjie Mu
- School of Clinical Medicine, Weifang Medical University, Weifang, China
- University of Health and Rehabilitation Sciences, Qingdao, China
| | - Kaixuan Lv
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - Jielun Yu
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
- Medical Laboratory Animal Center, Weifang Medical University, Weifang, China
- Weifang Key Laboratory of Animal Model Research on Cardiovascular and Cerebrovascular Diseases, Weifang, China
| | - Shangmin Chu
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - Lichun Zhang
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - Lingyu Kong
- School of Rehabilitation Medicine, Weifang Medical University, Weifang, China
| | - Linlin Zhang
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
| | - Yan Tian
- Research Center of Translational Medicine Shanghai East Hospital, Tongji University, Shanghai, China
| | - Xiaopeng Jia
- Shandong Qilu Stem Cell Engineering Co., Jinan, China
| | - Benhong Liu
- Department of Respiratory, Dongying People's Hospital, Dongying, China
| | - Youzhen Wei
- Research Center for Translational Medicine and Key Laboratory of Arrhythmias of the Ministry of Education of China, East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Nana Yang
- School of Bioscience and Technology, Weifang Medical University, Weifang, China
- Medical Laboratory Animal Center, Weifang Medical University, Weifang, China
- Weifang Key Laboratory of Animal Model Research on Cardiovascular and Cerebrovascular Diseases, Weifang, China
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4
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Luo P, Ding Y, He Y, Chen D, He Q, Huang Z, Huang S, Lei W. Hydrogen-oxygen therapy alleviates clinical symptoms in twelve patients hospitalized with COVID-19: A retrospective study of medical records. Medicine (Baltimore) 2022; 101:e27759. [PMID: 35244034 PMCID: PMC8896485 DOI: 10.1097/md.0000000000027759] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Accepted: 10/28/2021] [Indexed: 01/04/2023] Open
Abstract
A global public health crisis caused by the 2019 novel coronavirus disease (COVID-19) leads to considerable morbidity and mortality, which bring great challenge to respiratory medicine. Hydrogen-oxygen therapy contributes to treat severe respiratory diseases and improve lung functions, yet there is no information to support the clinical use of this therapy in the COVID-19 pneumonia.A retrospective study of medical records was carried out in Shishou Hospital of Traditional Chinese Medicine in Hubei, China. COVID-19 patients (aged ≥ 30 years) admitted to the hospital from January 29 to March 20, 2020 were subjected to control group (n = 12) who received routine therapy and case group (n = 12) who received additional hydrogen-oxygen therapy. The clinical characteristics of COVID-19 patients were analyzed. The physiological and biochemical indexes, including immune inflammation indicators, electrolytes, myocardial enzyme profile, and functions of liver and kidney, were examined and investigated before and after hydrogen-oxygen therapy.The results showed significant decreases in the neutrophil percentage and the concentration and abnormal proportion of C-reactive protein in COVID-19 patients received additional hydrogen-oxygen therapy.This novel therapeutic may alleviate clinical symptoms of COVID-19 patients by suppressing inflammation responses.
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Affiliation(s)
- Peng Luo
- Cardiovascular Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Yuanfang Ding
- Cardiology Department, Shishou Hospital of Traditional Chinese Medcine, Jingzhou, Hubei, China
| | - Yuan He
- Laboratory of Cardiovascular Diseases, Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Dafeng Chen
- Department of Precision Laboratory Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Qing He
- Laboratory of Cardiovascular Diseases, Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Zufeng Huang
- Cardiovascular Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
- Cardiology Department, Shishou Hospital of Traditional Chinese Medcine, Jingzhou, Hubei, China
| | - Shian Huang
- Cardiovascular Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
| | - Wei Lei
- Cardiovascular Medicine Center, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
- Laboratory of Cardiovascular Diseases, Guangdong Medical University, Zhanjiang, Guangdong, China
- Department of Precision Laboratory Medicine, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong, China
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5
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Zhang Y, Zhang J, Fu Z. Molecular hydrogen is a potential protective agent in the management of acute lung injury. Mol Med 2022; 28:27. [PMID: 35240982 PMCID: PMC8892414 DOI: 10.1186/s10020-022-00455-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Accepted: 02/14/2022] [Indexed: 11/21/2022] Open
Abstract
Acute lung injury (ALI) and acute respiratory distress syndrome, which is a more severe form of ALI, are life-threatening clinical syndromes observed in critically ill patients. Treatment methods to alleviate the pathogenesis of ALI have improved to a great extent at present. Although the efficacy of these therapies is limited, their relevance has increased remarkably with the ongoing pandemic caused by the novel coronavirus disease 2019 (COVID-19), which causes severe respiratory distress syndrome. Several studies have demonstrated the preventive and therapeutic effects of molecular hydrogen in the various diseases. The biological effects of molecular hydrogen mainly involve anti-inflammation, antioxidation, and autophagy and cell death modulation. This review focuses on the potential therapeutic effects of molecular hydrogen on ALI and its underlying mechanisms and aims to provide a theoretical basis for the clinical treatment of ALI and COVID-19.
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Affiliation(s)
- Yan Zhang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
| | - Jin Zhang
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China
| | - Zhiling Fu
- Department of Anesthesiology, Shengjing Hospital of China Medical University, Shenyang, 110004, People's Republic of China.
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Zhang D, Gao M, Jin Q, Ni Y, Li H, Jiang C, Zhang J. Development of Duramycin-Based Molecular Probes for Cell Death Imaging. Mol Imaging Biol 2022; 24:612-629. [PMID: 35142992 DOI: 10.1007/s11307-022-01707-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 01/10/2022] [Accepted: 01/27/2022] [Indexed: 10/19/2022]
Abstract
Cell death is involved in numerous pathological conditions such as cardiovascular disorders, ischemic stroke and organ transplant rejection, and plays a critical role in the treatment of cancer. Cell death imaging can serve as a noninvasive means to detect the severity of tissue damage, monitor the progression of diseases, and evaluate the effectiveness of treatments, which help to provide prognostic information and guide the formulation of individualized treatment plans. The high abundance of phosphatidylethanolamine (PE), which is predominantly confined to the inner leaflet of the lipid bilayer membrane in healthy mammalian cells, becomes exposed on the cell surface in the early stages of apoptosis or accessible to the extracellular milieu when the cell suffers from necrosis, thus representing an attractive target for cell death imaging. Duramycin is a tetracyclic polypeptide that contains 19 amino acids and can bind to PE with excellent affinity and specificity. Additionally, this peptide has several favorable structural traits including relatively low molecular weight, stability to enzymatic hydrolysis, and ease of conjugation and labeling. All these highlight the potential of duramycin as a candidate ligand for developing PE-specific molecular probes. By far, a couple of duramycin-based molecular probes such as Tc-99 m-, F-18-, or Ga-68-labeled duramycin have been developed to target exposed PE for in vivo noninvasive imaging of cell death in different animal models. In this review article, we describe the state of the art with respect to in vivo imaging of cell death using duramycin-based molecular probes, as validated by immunohistopathology.
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Affiliation(s)
- Dongjian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China
| | - Meng Gao
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China
| | - Qiaomei Jin
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China.,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China
| | - Yicheng Ni
- Theragnostic Laboratory, Campus Gasthuisberg, 3000, Leuven, Leuven, KU, Belgium
| | - Huailiang Li
- Department of General Surgery, Nanjing Lishui District Hospital of Traditional Chinese Medicine, Nanjing, 211200, Jiangsu Province, People's Republic of China
| | - Cuihua Jiang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China. .,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China.
| | - Jian Zhang
- Affiliated Hospital of Integrated Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China. .,Laboratories of Translational Medicine, Jiangsu Province Academy of Traditional Chinese Medicine, Nanjing, 210028, Jiangsu Province, People's Republic of China.
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7
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Audi SH, Jacobs ER, Taheri P, Ganesh S, Clough AV. Assessment of Protection Offered By the NRF2 Pathway Against Hyperoxia-Induced Acute Lung Injury in NRF2 Knockout Rats. Shock 2022; 57:274-280. [PMID: 34738958 PMCID: PMC8758548 DOI: 10.1097/shk.0000000000001882] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
ABSTRACT Nuclear factor erythroid 2-related factor (Nrf2) is a redox-sensitive transcription factor that responds to oxidative stress by activating expressions of key antioxidant and cytoprotective enzymes via the Nrf2-antioxidant response element (ARE) signaling pathway. Our objective was to characterize hyperoxia-induced acute lung injury (HALI) in Nrf2 knock-out (KO) rats to elucidate the role of this pathway in HALI. Adult Nrf2 wildtype (WT), and KO rats were exposed to room air (normoxia) or >95% O2 (hyperoxia) for 48 h, after which selected injury and functional endpoints were measured in vivo and ex vivo. Results demonstrate that the Nrf2-ARE signaling pathway provides some protection against HALI, as reflected by greater hyperoxia-induced histological injury and higher pulmonary endothelial filtration coefficient in KO versus WT rats. We observed larger hyperoxia-induced increases in lung expression of glutathione (GSH) synthetase, 3-nitrotyrosine (index of oxidative stress), and interleukin-1β, and in vivo lung uptake of the GSH-sensitive SPECT biomarker 99mTc-HMPAO in WT compared to KO rats. Hyperoxia also induced increases in lung expression of myeloperoxidase in both WT and KO rats, but with no difference between WT and KO. Hyperoxia had no effect on expression of Bcl-2 (anti-apoptotic protein) or peroxiredoxin-1. These results suggest that the protection offered by the Nrf2-ARE pathway against HALI is in part via its regulation of the GSH redox pathway. To the best of our knowledge, this is the first study to assess the role of the Nrf2-ARE signaling pathway in protection against HALI using a rat Nrf2 knockout model.
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Affiliation(s)
- Said H. Audi
- Marquette University-Medical College of Wisconsin Department of Biomedical Engineering
- Clement J. Zablocki V.A. Medical Center
| | - Elizabeth R. Jacobs
- Marquette University-Medical College of Wisconsin Department of Biomedical Engineering
- Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin
| | - Pardis Taheri
- Marquette University-Medical College of Wisconsin Department of Biomedical Engineering
- Clement J. Zablocki V.A. Medical Center
| | - Swetha Ganesh
- Marquette University-Medical College of Wisconsin Department of Biomedical Engineering
- Clement J. Zablocki V.A. Medical Center
| | - Anne V. Clough
- Clement J. Zablocki V.A. Medical Center
- Department of Mathematical and Statistical Sciences, Marquette University
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Audi SH, Ganesh S, Taheri P, Zhang X, Dash RK, Clough AV, Jacobs ER. Depolarized mitochondrial membrane potential and protection with duroquinone in isolated perfused lungs from rats exposed to hyperoxia. J Appl Physiol (1985) 2022; 132:346-356. [PMID: 34941441 PMCID: PMC8816614 DOI: 10.1152/japplphysiol.00565.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Dissipation of mitochondrial membrane potential (Δψm) is a hallmark of mitochondrial dysfunction. Our objective was to use a previously developed experimental-computational approach to estimate tissue Δψm in intact lungs of rats exposed to hyperoxia and to evaluate the ability of duroquinone (DQ) to reverse any hyperoxia-induced depolarization of lung Δψm. Rats were exposed to hyperoxia (>95% O2) or normoxia (room air) for 48 h, after which lungs were excised and connected to a ventilation-perfusion system. The experimental protocol consisted of measuring the concentration of the fluorescent dye rhodamine 6 G (R6G) during three single-pass phases: loading, washing, and uncoupling, in which the lungs were perfused with and without R6G and with the mitochondrial uncoupler FCCP, respectively. For normoxic lungs, the protocol was repeated with 1) rotenone (complex I inhibitor), 2) rotenone and either DQ or its vehicle (DMSO), and 3) rotenone, glutathione (GSH), and either DQ or DMSO added to the perfusate. Hyperoxic lungs were studied with and without DQ and GSH added to the perfusate. Computational modeling was used to estimate lung Δψm from R6G data. Rat exposure to hyperoxia resulted in partial depolarization (-33 mV) of lung Δψm and complex I inhibition depolarized lung Δψm by -83 mV. Results also demonstrate the efficacy of DQ to fully reverse both rotenone- and hyperoxia-induced lung Δψm depolarization. This study demonstrates hyperoxia-induced Δψm depolarization in intact lungs and the utility of this approach for assessing the impact of potential therapies such as exogenous quinones that target mitochondria in intact lungs.NEW & NOTEWORTHY This study is the first to measure hyperoxia-induced Δψm depolarization in isolated perfused lungs. Hyperoxia resulted in a partial depolarization of Δψm, which was fully reversed with duroquinone, demonstrating the utility of this approach for assessing the impact of potential therapies that target mitochondria such as exogenous quinones.
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Affiliation(s)
- Said H. Audi
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin,2Clement J. Zablocki V.A. Medical Center, Milwaukee, Wisconsin,3Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Swetha Ganesh
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Pardis Taheri
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Xiao Zhang
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Ranjan K. Dash
- 1Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anne V. Clough
- 2Clement J. Zablocki V.A. Medical Center, Milwaukee, Wisconsin,3Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin,4Department of Mathematical and Statistical Sciences, Marquette University, Milwaukee, Wisconsin
| | - Elizabeth R. Jacobs
- 2Clement J. Zablocki V.A. Medical Center, Milwaukee, Wisconsin,3Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
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9
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Yuan G, Liu S, Ma H, Su S, Wen F, Tang X, Zhang Z, Zhao J, Lin L, Xiang X, Nie D, Tang G. Targeting Phosphatidylethanolamine with Fluorine-18 Labeled Small Molecule Probe for Apoptosis Imaging. Mol Imaging Biol 2021; 22:914-923. [PMID: 31828718 DOI: 10.1007/s11307-019-01460-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
PURPOSE Externalization of phosphatidylethanolamine (PE) in dying cells makes the phospholipid an attractive target for apoptosis imaging. However, no ideal PE-targeted positron emission tomography (PET) radiotracer was developed. The goal of the study was to develop a novel PE-targeted radiopharmaceutical to imaging apoptosis. PROCEDURE In this study, we have radiolabeled PE-binding polypeptide duramycin with fluorine-18 for PET imaging of apoptosis. Al[18F]F-NOTA-PEG3-duramycin was synthesized via chelation reaction of NOTA-PEG3-duramycin with Al[18F]F. PE-binding capacity of Al[18F]F-NOTA-PEG3-duramycin was determined in a competitive radiometric PE-binding assay. The pharmacokinetic profile was evaluated in Kunming mice. The apoptosis imaging capacity of Al[18F]F-NOTA-PEG3-duramycin was evaluated using in vitro cell uptake assay with camptothecin-treated Jurkat cells, along with in vivo PET imaging using erlotinib-treated nude mice. RESULTS The total synthesis procedure lasted for 30 min, with a decay-uncorrected radiochemical yield of 21.3 ± 2.6 % (n = 10). Compared with the control cells, the binding of Al[18F]F-NOTA-PEG3-duramycin with camptothecin-induced apoptotic cells resulted in a tripling increase. A competitive radiometric PE-binding assay strongly confirmed the binding of Al[18F]F-NOTA-PEG3-duramycin to PE. The biodistribution study showed rapid blood clearance, prominent kidney retention, and low liver uptake. In the in vivo PET/CT imaging, Al[18F]F-NOTA-PEG3-duramycin demonstrated 2-fold increase in erlotinib-treated HCC827 tumors in nude mice. CONCLUSION Considering the facile preparation and improved biological properties, Al[18F]F-NOTA-PEG3-duramycin seems to be a promising PET tracer candidate for imaging apoptosis in the monitoring of cancer treatment.
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Affiliation(s)
- Gongjun Yuan
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Shaoyu Liu
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Hui Ma
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Shu Su
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Fuhua Wen
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Xiaolan Tang
- Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China.,School of Materials and Energy, South China Agricultural University, Guangzhou, 510642, China
| | - Zhanwen Zhang
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Jing Zhao
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Liping Lin
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Xianhong Xiang
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China
| | - Dahong Nie
- Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China. .,Department of Radiation Oncology, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China.
| | - Ganghua Tang
- Department of Nuclear Medicine and Medical Imaging, the First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, China. .,Guangdong Engineering Research center for Translational Application of Medical Radiopharmaceuticals, Sun Yat-sen University, Guangzhou, 510080, China. .,Nanfang PET Center and Department of Nuclear Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, 510515, China.
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10
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Jagtap J, Audi S, Razeghi-Kondelaji MH, Fish BL, Hansen C, Narayan J, Gao F, Sharma G, Parchur AK, Banerjee A, Bergom C, Medhora M, Joshi A. A rapid dynamic in vivo near-infrared fluorescence imaging assay to track lung vascular permeability after acute radiation injury. Am J Physiol Lung Cell Mol Physiol 2021; 320:L436-L450. [PMID: 33404364 DOI: 10.1152/ajplung.00066.2020] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
To develop a dynamic in vivo near-infrared (NIR) fluorescence imaging assay to quantify sequential changes in lung vascular permeability-surface area product (PS) in rodents. Dynamic NIR imaging methods for determining lung vascular permeability-surface area product were developed and tested on non-irradiated and 13 Gy irradiated rats with/without treatment with lisinopril, a radiation mitigator. A physiologically-based pharmacokinetic (PBPK) model of indocyanine green (ICG) pulmonary disposition was applied to in vivo imaging data and PS was estimated. In vivo results were validated by five accepted assays: ex vivo perfused lung imaging, endothelial filtration coefficient (Kf) measurement, pulmonary vascular resistance measurement, Evan's blue dye uptake, and histopathology. A PBPK model-derived measure of lung vascular permeability-surface area product increased from 2.60 ± 0.40 [CL: 2.42-2.78] mL/min in the non-irradiated group to 6.94 ± 8.25 [CL: 3.56-10.31] mL/min in 13 Gy group after 42 days. Lisinopril treatment lowered PS in the 13 Gy group to 4.76 ± 6.17 [CL: 2.12-7.40] mL/min. A much higher up to 5× change in PS values was observed in rats exhibiting severe radiation injury. Ex vivo Kf (mL/min/cm H2O/g dry lung weight), a measure of pulmonary vascular permeability, showed similar trends in lungs of irradiated rats (0.164 ± 0.081 [CL: 0.11-0.22]) as compared to non-irradiated controls (0.022 ± 0.003 [CL: 0.019-0.025]), with reduction to 0.070 ± 0.035 [CL: 0.045-0.096] for irradiated rats treated with lisinopril. Similar trends were observed for ex vivo pulmonary vascular resistance, Evan's blue uptake, and histopathology. Our results suggest that whole body dynamic NIR fluorescence imaging can replace current assays, which are all terminal. The imaging accurately tracks changes in PS and changes in lung interstitial transport in vivo in response to radiation injury.
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Affiliation(s)
- Jaidip Jagtap
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Said Audi
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
| | | | - Brian L Fish
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Christopher Hansen
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Jayashree Narayan
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Feng Gao
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Gayatri Sharma
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Abdul K Parchur
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anjishnu Banerjee
- Division of Biostatistics, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Carmen Bergom
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Cancer Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Meetha Medhora
- Department of Radiation Oncology, Medical College of Wisconsin, Milwaukee, Wisconsin.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Pulmonary Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Amit Joshi
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
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11
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Nogueira JE, Amorim MR, Pinto AP, da Rocha AL, da Silva ASR, Branco LGS. Molecular hydrogen downregulates acute exhaustive exercise-induced skeletal muscle damage. Can J Physiol Pharmacol 2020; 99:812-820. [PMID: 33356867 DOI: 10.1139/cjpp-2020-0297] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Physical exercise-induced skeletal muscle damage may be characterized by increased oxidative stress, inflammation, and apoptosis which may be beneficial when exercise is regular, but it is rather harmful when exercise is exhaustive and performed acutely by unaccustomed individuals. Molecular hydrogen (H2) has emerged as a potent antioxidant, anti-inflammatory, and anti-apoptotic agent, but its action on the deleterious effects of acute exhaustive exercise in muscle damage remain unknown. Therefore, we tested the hypothesis that H2 decreases acute exhaustive exercise-induced skeletal muscle damage of sedentary rats. Rats ran to exhaustion on a sealed treadmill inhaling an H2-containing mixture or the control gas. We measured oxidative stress (SOD, GSH, and TBARS), inflammatory (TNF-α, IL-1β, IL-6, IL-10, and NF-κB phosphorylation), and apoptotic (expression of caspase-3, Bcl-2, and HSP70) markers. Exercise caused no changes in SOD activity but increased TBARS levels. H2 caused increases in exercise-induced SOD activity and blunted exercise-induced increased TBARS levels. We observed exercise-induced TNF-α and IL-6 surges as well as NF-κB phosphorylation, which were blunted by H2. Exercise increased cleaved caspase-3 expression, and H2 reduced this response. In conclusion, H2 effectively downregulates muscle damage, reducing oxidative stress, inflammation, and apoptosis after acute exhaustive exercise performed by an unaccustomed organism.
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Affiliation(s)
- Jonatas E Nogueira
- School of Physical Education and Sports of Ribeirao Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Mateus R Amorim
- Department of Basic and Oral Biology, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Ana P Pinto
- Postgraduate Program in Rehabilitation and Functional Performance, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Alisson L da Rocha
- Postgraduate Program in Rehabilitation and Functional Performance, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Adelino S R da Silva
- School of Physical Education and Sports of Ribeirao Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.,Postgraduate Program in Rehabilitation and Functional Performance, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Luiz G S Branco
- Department of Basic and Oral Biology, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.,Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
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12
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Audi SH, Cammarata A, Clough AV, Dash RK, Jacobs ER. Quantification of mitochondrial membrane potential in the isolated rat lung using rhodamine 6G. J Appl Physiol (1985) 2020; 128:892-906. [PMID: 32134711 DOI: 10.1152/japplphysiol.00789.2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Mitochondrial membrane potential (Δψm) plays a key role in vital mitochondrial functions, and its dissipation is a hallmark of mitochondrial dysfunction. The objective of this study was to develop an experimental and computational approach for estimating Δψm in intact rat lungs using the lipophilic fluorescent cationic dye rhodamine 6G (R6G). Rat lungs were excised and connected to a ventilation-perfusion system. The experimental protocol consisted of three single-pass phases, loading, washing, and uncoupling, in which the lungs were perfused with R6G-containing perfusate, fresh R6G-free perfusate, or R6G-free perfusate containing the mitochondrial uncoupler FCCP, respectively. This protocol was carried out with lung perfusate containing verapamil vehicle or verapamil, an inhibitor of the multidrug efflux pump P-glycoprotein (Pgp). Results show that the addition of FCCP resulted in an increase in R6G venous effluent concentration and that this increase was larger in the presence of verapamil than in its absence. A physiologically based pharmacokinetic (PBPK) model for the pulmonary disposition of R6G was developed and used for quantitative interpretation of the kinetic data, including estimating Δψm. The estimated value of Δψm [-144 ± 24 (SD) mV] was not significantly altered by inhibiting Pgp with verapamil and is comparable with that estimated previously in cultured pulmonary endothelial cells. These results demonstrate the utility of the proposed approach for quantifying Δψm in intact functioning lungs. This approach has potential to provide quantitative assessment of the effect of injurious conditions on lung mitochondrial function and to evaluate the impact of therapies that target mitochondria.NEW & NOTEWORTHY A novel experimental and computational approach for estimating mitochondrial membrane potential (Δψm) in intact functioning lungs is presented. The isolated rat lung inlet-outlet concentrations of the fluorescent cationic dye rhodamine 6G were measured and analyzed by using a computational model of its pulmonary disposition to determine Δψm. The approach has the potential to provide quantitative assessment of the effect of injurious conditions and their therapies on lung mitochondrial function.
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Affiliation(s)
- Said H Audi
- Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin.,Clement J. Zablocki Department of Veterans Affairs Medical Center, Milwaukee, Wisconsin.,Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anthony Cammarata
- Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Anne V Clough
- Clement J. Zablocki Department of Veterans Affairs Medical Center, Milwaukee, Wisconsin.,Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin.,Department of Mathematical and Statistical Sciences, Marquette University, Milwaukee, Wisconsin
| | - Ranjan K Dash
- Department of Biomedical Engineering, Marquette University-Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Elizabeth R Jacobs
- Clement J. Zablocki Department of Veterans Affairs Medical Center, Milwaukee, Wisconsin.,Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
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13
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Nogueira JE, de Deus JL, Amorim MR, Batalhão ME, Leão RM, Carnio EC, Branco LG. Inhaled molecular hydrogen attenuates intense acute exercise-induced hippocampal inflammation in sedentary rats. Neurosci Lett 2020; 715:134577. [DOI: 10.1016/j.neulet.2019.134577] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/24/2019] [Accepted: 10/21/2019] [Indexed: 12/17/2022]
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14
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Clough AV, Barry K, Rizzo BM, Jacobs ER, Audi SH. Pharmacokinetics of 99mTc-HMPAO in isolated perfused rat lungs. J Appl Physiol (1985) 2019; 127:1317-1327. [DOI: 10.1152/japplphysiol.00717.2018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Lung uptake of technetium-labeled hexamethylpropyleneamine oxime (HMPAO) increases in rat models of human acute lung injury, consistent with increases in lung tissue glutathione (GSH). Since 99mTc-HMPAO uptake is the net result of multiple cellular and vascular processes, the objective was to develop an approach to investigate the pharmacokinetics of 99mTc-HMPAO uptake in isolated perfused rat lungs. Lungs of anesthetized rats were excised and connected to a ventilation-perfusion system. 99mTc-HMPAO (56 MBq) was injected into the pulmonary arterial cannula, a time sequence of images was acquired, and lung time-activity curves were constructed. Imaging was repeated with a range of pump flows and perfusate albumin concentrations and before and after depletion of GSH with diethyl maleate (DEM). A pharmacokinetic model of 99mTc-HMPAO pulmonary disposition was developed and used for quantitative interpretation of the time-activity curves. Experimental results reveal that 99mTc-HMPAO lung uptake, defined as the steady-state value of the 99mTc-HMPAO lung time-activity curve, was inversely related to pump flow. Also, 99mTc-HMPAO lung uptake decreased by ~65% after addition of DEM to the perfusate. Increased perfusate albumin concentration also resulted in decreased 99mTc-HMPAO lung uptake. Model simulations under in vivo flow conditions indicate that lung tissue GSH is the dominant factor in 99mTc-HMPAO retention in lung tissue. The approach allows for evaluation of the dominant factors that determine imaging biomarker uptake, separation of the contributions of pulmonary versus systemic processes, and application of this knowledge to in vivo studies. NEW & NOTEWORTHY We developed an approach for studying the pharmacokinetics of technetium-labeled hexamethylpropyleneamine oxime (99mTc-HMPAO) in isolated perfused lungs. A distributed-in-space-and-time computational model was fit to data and used to investigate questions that cannot readily be addressed in vivo. Experimental and modeling results indicate that tissue GSH is the dominant factor in 99mTc-HMPAO retention in lung tissue. This modeling approach can be readily extended to investigate the lung pharmacokinetics of other biomarkers and models of lung injury and treatment thereof.
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Affiliation(s)
- Anne V. Clough
- Department of Mathematics, Statistics, and Computer Science, Marquette University, Milwaukee, Wisconsin
- Milwaukee Veterans Affairs Medical Center, Milwaukee, Wisconsin
| | - Katherine Barry
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
| | - Benjamin M. Rizzo
- Department of Mathematics, Statistics, and Computer Science, Marquette University, Milwaukee, Wisconsin
| | - Elizabeth R. Jacobs
- Milwaukee Veterans Affairs Medical Center, Milwaukee, Wisconsin
- Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Said H. Audi
- Milwaukee Veterans Affairs Medical Center, Milwaukee, Wisconsin
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin
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15
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Nogueira JE, Passaglia P, Mota CMD, Santos BM, Batalhão ME, Carnio EC, Branco LGS. Molecular hydrogen reduces acute exercise-induced inflammatory and oxidative stress status. Free Radic Biol Med 2018; 129:186-193. [PMID: 30243702 DOI: 10.1016/j.freeradbiomed.2018.09.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/17/2018] [Accepted: 09/18/2018] [Indexed: 12/15/2022]
Abstract
Physical exercise induces inflammatory and oxidative markers production in the skeletal muscle and this process is under the control of both endogenous and exogenous modulators. Recently, molecular hydrogen (H2) has been described as a therapeutic gas able to reduced oxidative stress in a number of conditions. However, nothing is known about its putative role in the inflammatory and oxidative status during a session of acute physical exercise in sedentary rats. Therefore, we tested the hypothesis that H2 attenuates both inflammation and oxidative stress induced by acute physical exercise. Rats ran at 80% of their maximum running velocity on a closed treadmill inhaling either the H2 gas (2% H2, 21% O2, balanced with N2) or the control gas (0% H2, 21% O2, balanced with N2) and were euthanized immediately or 3 h after exercise. We assessed plasma levels of inflammatory cytokines [tumor necrosis factor-α (TNF-α), interleukin (IL)-1β and IL-6] and oxidative markers [superoxide dismutase (SOD), thiobarbituric acid reactive species (TBARS) and nitrite/nitrate (NOx)]. In addition, we evaluated the phosphorylation status of intracellular signaling proteins [glycogen synthase kinase type 3 (GSK3α/β) and the cAMP responsive element binding protein (CREB)] that modulate several processes in the skeletal muscle during exercise, including changes in exercise-induced reactive oxygen species (ROS) production. As expected, physical exercise increased virtually all the analyzed parameters. In the running rats, H2 blunted exercise-induced plasma inflammatory cytokines (TNF-α and IL-6) surges. Regarding the oxidative stress markers, H2 caused further increases in exercise-induced SOD activity and attenuated the exercise-induced increases in TBARS 3 h after exercise. Moreover, GSK3α/β phosphorylation was not affected by exercise or H2 inhalation. Otherwise, exercise caused an increased CREB phosphorylation which was attenuated by H2. These data are consistent with the notion that H2 plays a key role in decreasing exercise-induced inflammation, oxidative stress, and cellular stress.
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Affiliation(s)
- Jonatas E Nogueira
- Postgraduate Program in Rehabilitation and Functional Performance, University of São Paulo, Ribeirão Preto, SP, Brazil; School of Physical Education and Sports of Ribeirao Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Patricia Passaglia
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Clarissa M D Mota
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Bruna M Santos
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Marcelo E Batalhão
- Department of General and Specialized Nursing, School of Nursing of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Evelin C Carnio
- Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of General and Specialized Nursing, School of Nursing of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Luiz G S Branco
- Postgraduate Program in Rehabilitation and Functional Performance, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Physiology, School of Medicine of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil; Department of Morphology, Physiology, and Basic Pathology, Dental School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
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16
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What's New in SHOCK October 2017? Shock 2018; 48:387-389. [PMID: 28915213 DOI: 10.1097/shk.0000000000000942] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Audi SH, Friedly N, Dash RK, Beyer AM, Clough AV, Jacobs ER. Detection of hydrogen peroxide production in the isolated rat lung using Amplex red. Free Radic Res 2018; 52:1052-1062. [PMID: 30175632 DOI: 10.1080/10715762.2018.1511051] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The objectives of this study were to develop a robust protocol to measure the rate of hydrogen peroxide (H2O2) production in isolated perfused rat lungs, as an index of oxidative stress, and to determine the cellular sources of the measured H2O2 using the extracellular probe Amplex red (AR). AR was added to the recirculating perfusate in an isolated perfused rat lung. AR's highly fluorescent oxidation product resorufin was measured in the perfusate. Experiments were carried out without and with rotenone (complex I inhibitor), thenoyltrifluoroacetone (complex II inhibitor), antimycin A (complex III inhibitor), potassium cyanide (complex IV inhibitor), or diohenylene iodonium (inhibitor of flavin-containing enzymes, e.g. NAD(P)H oxidase or NOX) added to the perfusate. We also evaluated the effect of acute changes in oxygen (O2) concentration of ventilation gas on lung rate of H2O2 release into the perfusate. Baseline lung rate of H2O2 release was 8.45 ± 0.31 (SEM) nmol/min/g dry wt. Inhibiting mitochondrial complex II reduced this rate by 76%, and inhibiting flavin-containing enzymes reduced it by another 23%. Inhibiting complex I had a small (13%) effect on the rate, whereas inhibiting complex III had no effect. Inhibiting complex IV increased this rate by 310%. Increasing %O2 in the ventilation gas mixture from 15 to 95% had a small (27%) effect on this rate, and this O2-dependent increase was mostly nonmitochondrial. Results suggest complex II as a potentially important source and/or regulator of mitochondrial H2O2, and that most of acute hyperoxia-enhanced lung rate of H2O2 release is from nonmitochondrial rather than mitochondrial sources.
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Affiliation(s)
- Said H Audi
- a Medical College of Wisconsin Department of Biomedical Engineering , Marquette University , Milwaukee , WI , USA.,c Division of Pulmonary and Critical Care Medicine , Medical College of Wisconsin , Milwaukee, WI , USA
| | - Nina Friedly
- a Medical College of Wisconsin Department of Biomedical Engineering , Marquette University , Milwaukee , WI , USA
| | - Ranjan K Dash
- a Medical College of Wisconsin Department of Biomedical Engineering , Marquette University , Milwaukee , WI , USA
| | - Andreas M Beyer
- d Department of Medicine , Medical College of Wisconsin , Milwaukee, WI , USA
| | - Anne V Clough
- e Department of Mathematics, Statistics, and Computer Science , Marquette University , Milwaukee , WI , USA
| | - Elizabeth R Jacobs
- b Zablocki VA Medical Center , Milwaukee, WI , USA.,c Division of Pulmonary and Critical Care Medicine , Medical College of Wisconsin , Milwaukee, WI , USA
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18
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Zhang X, Dash RK, Jacobs ER, Camara AKS, Clough AV, Audi SH. Integrated computational model of the bioenergetics of isolated lung mitochondria. PLoS One 2018; 13:e0197921. [PMID: 29889855 PMCID: PMC5995348 DOI: 10.1371/journal.pone.0197921] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2017] [Accepted: 05/10/2018] [Indexed: 01/10/2023] Open
Abstract
Integrated computational modeling provides a mechanistic and quantitative framework for describing lung mitochondrial bioenergetics. Thus, the objective of this study was to develop and validate a thermodynamically-constrained integrated computational model of the bioenergetics of isolated lung mitochondria. The model incorporates the major biochemical reactions and transport processes in lung mitochondria. A general framework was developed to model those biochemical reactions and transport processes. Intrinsic model parameters such as binding constants were estimated using previously published isolated enzymes and transporters kinetic data. Extrinsic model parameters such as maximal reaction and transport velocities were estimated by fitting the integrated bioenergetics model to published and new tricarboxylic acid cycle and respirometry data measured in isolated rat lung mitochondria. The integrated model was then validated by assessing its ability to predict experimental data not used for the estimation of the extrinsic model parameters. For example, the model was able to predict reasonably well the substrate and temperature dependency of mitochondrial oxygen consumption, kinetics of NADH redox status, and the kinetics of mitochondrial accumulation of the cationic dye rhodamine 123, driven by mitochondrial membrane potential, under different respiratory states. The latter required the coupling of the integrated bioenergetics model to a pharmacokinetic model for the mitochondrial uptake of rhodamine 123 from buffer. The integrated bioenergetics model provides a mechanistic and quantitative framework for 1) integrating experimental data from isolated lung mitochondria under diverse experimental conditions, and 2) assessing the impact of a change in one or more mitochondrial processes on overall lung mitochondrial bioenergetics. In addition, the model provides important insights into the bioenergetics and respiration of lung mitochondria and how they differ from those of mitochondria from other organs. To the best of our knowledge, this model is the first for the bioenergetics of isolated lung mitochondria.
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Affiliation(s)
- Xiao Zhang
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin, United States of America
| | - Ranjan K. Dash
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin, United States of America
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Elizabeth R. Jacobs
- Zablocki V.A. Medical Center, Milwaukee, Wisconsin, United States of America
- Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Amadou K. S. Camara
- Department of Physiology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Anne V. Clough
- Zablocki V.A. Medical Center, Milwaukee, Wisconsin, United States of America
- Department of Mathematics, Statistics, and Computer Science, Marquette University, Milwaukee, Wisconsin, United States of America
| | - Said H. Audi
- Department of Biomedical Engineering, Marquette University, Milwaukee, Wisconsin, United States of America
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
- Zablocki V.A. Medical Center, Milwaukee, Wisconsin, United States of America
- Division of Pulmonary and Critical Care Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
- * E-mail:
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